From 80793ab7a3d5cf4c9cdad0418683b27e1f2cda85 Mon Sep 17 00:00:00 2001
From: ZhengJiayin <13230092115@163.com>
Date: Tue, 19 May 2026 19:55:18 +0800
Subject: [PATCH] w4

---
 w4+/Circle.class    | Bin 0 -> 323 bytes
 w4+/Circle.java     |  12 ++++++++++++
 w4+/Main.class      | Bin 0 -> 504 bytes
 w4+/Main.java       |  11 +++++++++++
 w4+/Rectangle.class | Bin 0 -> 332 bytes
 w4+/Rectangle.java  |  14 ++++++++++++++
 w4+/Shape.class     | Bin 0 -> 208 bytes
 w4+/Shape.java      |   3 +++
 w4+/ShapeUtil.class | Bin 0 -> 567 bytes
 w4+/ShapeUtil.java  |   5 +++++
 w4+/Triangle.class  | Bin 0 -> 342 bytes
 w4+/Triangle.java   |  14 ++++++++++++++
 12 files changed, 59 insertions(+)
 create mode 100644 w4+/Circle.class
 create mode 100644 w4+/Circle.java
 create mode 100644 w4+/Main.class
 create mode 100644 w4+/Main.java
 create mode 100644 w4+/Rectangle.class
 create mode 100644 w4+/Rectangle.java
 create mode 100644 w4+/Shape.class
 create mode 100644 w4+/Shape.java
 create mode 100644 w4+/ShapeUtil.class
 create mode 100644 w4+/ShapeUtil.java
 create mode 100644 w4+/Triangle.class
 create mode 100644 w4+/Triangle.java

diff --git a/w4+/Circle.class b/w4+/Circle.class
new file mode 100644
index 0000000000000000000000000000000000000000..69314601ff69a6dbf469797722397883513a7f9e
GIT binary patch
literal 323
zcmX|5%T5A85Uk$UxXWgVfXY!X3Y#cDAVkB)lX`)0A7BEbxR`O*-!di;6AylXzhq+U
zS&iwW`c+lkpWp8v0QzW0aNr7fF?<9Bf3%d3iV&RZTo(g^+v!e1>>w0~V$=}xZm7*{
zWl2WPb@@b~Odug7ck)^GRx)4oZe+0xF2bX)adz4!c%7^};WS*&Sy#W-xw<VMrpk=v
z)H;cUDlUzZ)xC@mjn<`^sVi-lwcmSZ)*XlZi^H!IBY(q{?R@O=q`_4Rmjj5>H&A-A
ug?QzT&}2-ijR%kUAp)MZu=l4s<|$cD3-xpZabLm9zt*zZm2sc5gM%NFAu(0}

literal 0
HcmV?d00001

diff --git a/w4+/Circle.java b/w4+/Circle.java
new file mode 100644
index 0000000..0a0e22d
--- /dev/null
+++ b/w4+/Circle.java
@@ -0,0 +1,12 @@
+class Circle extends Shape {
+    private double radius;
+
+    Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double getArea() {
+        return Math.PI * radius * radius;
+    }
+}
\ No newline at end of file
diff --git a/w4+/Main.class b/w4+/Main.class
new file mode 100644
index 0000000000000000000000000000000000000000..398bcdafe62bec0950885ee5df5af9d77f688b33
GIT binary patch
literal 504
zcmYLGTT22#7(L@<*WFAdRx85NZmyT|q29V+C_Pz0S`a<0y4Z-WvTXgYo{WTkKtC!v
zV~GPZ-|d_;-^};@^Z5nf0u>V>gmpyXh(Z%c4V*WpI&{2#^{z8;yMcgqE<G7s3WV+A
zqmCFeb?JA9u2!?C!DT{6TnVfSMC^t_B?XLo(kY~XsXw4r+xT-#B#>5&j6l?G%qbfJ
zv9>S&8L<T;w_vOzZDI#G9r-wRvBw))FV4h$2;`9d#Ft)h<-3l6X*cJUGu6ofd%AI?
zM^hj7T!Ca$dhYG(sN?!=r!!<GGMd*j_H%Rj{8m80J|(Ev8o&Bo_gX5jp~Q|A4tebJ
z_tXl3?|{bhkWrRa&_+vBh<7>y1)i#`d;>O$v<li|HbQ$kgZ^Z}m|~?lLxOI~!rBzp
x%?#^|HZ5#Tk-aT{V7tP7#JyDB<^X^&R;abfMhc9}h@r~6PB<Qc66+z9e*u{#P+0%~

literal 0
HcmV?d00001

diff --git a/w4+/Main.java b/w4+/Main.java
new file mode 100644
index 0000000..45d4722
--- /dev/null
+++ b/w4+/Main.java
@@ -0,0 +1,11 @@
+public class Main {
+    public static void main(String[] args) {
+        Shape circle = new Circle(5.0);
+        Shape rectangle = new Rectangle(4.0, 6.0);
+        Shape triangle = new Triangle(3.0, 8.0);
+
+        ShapeUtil.printArea(circle);
+        ShapeUtil.printArea(rectangle);
+        ShapeUtil.printArea(triangle);
+    }
+}
\ No newline at end of file
diff --git a/w4+/Rectangle.class b/w4+/Rectangle.class
new file mode 100644
index 0000000000000000000000000000000000000000..48e626ac9395650a48902c71532ae6db9b65029b
GIT binary patch
literal 332
zcmX|5%Syvg6r7W%iD^>nYb$PSvT);81u?i17goBzZ7<37kxEGGXNk}vxbOq~C~*>`
zT$p>#nVB=^=lAOyzy%INSg?IK5nOlzcT}oZE%44wWtvNYJxs>|wh;ITBWxoQ1owK{
zsH%9T&V4hprW8otisA@KtME!~in1X+%=2_CaIWVws*_t&>AS_tMAr{$()#^EH&?Y*
zT~ICvNApEJ)i<Uk<4w@%qgpB)F~Z{679TI^D&}=Rcz+*)9d>81*#SxR3CT{@@UwJ{
v-Umm50dW9_=n_2y@DX#dU>AG;3y#SM6=AlbcZJ^5`^M{aOhnx0%)-GRdL%Ek

literal 0
HcmV?d00001

diff --git a/w4+/Rectangle.java b/w4+/Rectangle.java
new file mode 100644
index 0000000..7e39dbe
--- /dev/null
+++ b/w4+/Rectangle.java
@@ -0,0 +1,14 @@
+class Rectangle extends Shape {
+    private double width;
+    private double height;
+
+    Rectangle(double width, double height) {
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public double getArea() {
+        return width * height;
+    }
+}
\ No newline at end of file
diff --git a/w4+/Shape.class b/w4+/Shape.class
new file mode 100644
index 0000000000000000000000000000000000000000..64e3efd1c47b8cdaa114118254ca1c2d550d8aaf
GIT binary patch
literal 208
zcmW+w%L;-}6rAJhmRa@#LCb29KTtswt)do2`>S0{F%8lFt5wjV59p(!b3KchVTNJO
z_xJt)Si*N<z!b1N*l-BLOg?0g%OVMmQKsUW;4IQ2tyctdGCd1)2zGdtcSW!^<%P-L
zr-eE+w@6hd8RhJVMAhp`$+oj4xMA5;vD&3Nbldh^4_RXf-q)v*KLDZ2YQ#+1nY}<y
T7F=W0F>8y^gV(x!MgxOC0c<0I

literal 0
HcmV?d00001

diff --git a/w4+/Shape.java b/w4+/Shape.java
new file mode 100644
index 0000000..9b09498
--- /dev/null
+++ b/w4+/Shape.java
@@ -0,0 +1,3 @@
+abstract class Shape {
+    public abstract double getArea();
+}
\ No newline at end of file
diff --git a/w4+/ShapeUtil.class b/w4+/ShapeUtil.class
new file mode 100644
index 0000000000000000000000000000000000000000..dd3415a1f896ee2db465c0f8683e9e6f6f86e068
GIT binary patch
literal 567
zcmZuv%TB^T6g|UhXsv)CzEOOjg#{$WUD3oyToE;?VvMVTBi2AmuqE-cbb-c1KfsSN
z-YG`WIEy<scg{WM+?jd*czFY`i=v7U!W<C|QN$Qhx7NU_bS$S`Id0yHmd6mQ+K%n*
zF@*JELqQx0hpJ%$+Ap|yf9HuVp<JJuvh{$-b}J`++wn}VFRZQ+M}qhY<?ZW&qauYV
zj<kjhrWvB<jnxwjye+(a0ta$66*HLSnA0$ig<o<t*Kc+teqeQcaePgZdaXE84eXBq
zhKeQRIF>c6AkUEb#}--YNt47;)yEjfwC%Kw%dyhvPK+;|KhtrnF(|<tXP(_*h#a_A
zWHDK{9dYD$o1%Ye1*VliZ#1T=*Mk<L*kDji*YCH)p)E&Cd{dRBYvi#?k0qCk^ju(A
zrz}T1la<mF*aIaD8x-ZS%oP-{NxOvZfCtsNNAUDy<Q1WdaA}C-GqUCoi|0Sx@?QX9
N%pyV^Ta<^Oe*!EfdPe{N

literal 0
HcmV?d00001

diff --git a/w4+/ShapeUtil.java b/w4+/ShapeUtil.java
new file mode 100644
index 0000000..c7cfac3
--- /dev/null
+++ b/w4+/ShapeUtil.java
@@ -0,0 +1,5 @@
+class ShapeUtil {
+    public static void printArea(Shape shape) {
+        System.out.printf("%.2f%n", shape.getArea());
+    }
+}
\ No newline at end of file
diff --git a/w4+/Triangle.class b/w4+/Triangle.class
new file mode 100644
index 0000000000000000000000000000000000000000..a953a7d9b445683aec540962b0e59b98700dbc22
GIT binary patch
literal 342
zcmX|6OHRWu6ddPcHz8?IDZd>nXtL;rEgvBwR)|fj?j5j_P)JcoxfVjALSn%II0Yv`
zOd`OR=J~xD&)A>e?;ik;vFpQvt>6T3AqCt?p&yKZJSwZQIT5f&@ytUHo`N4>4S_&!
zT9>-Y?<jLJ{m3HHR?-g;wY)4$nHP;b{bB?cT}Npe&nQ1%+)y4}mX*0$-e;zs>a6uq
zxoOU7qr1FRz@IFZ^|iSuTQdC18{g_DjXg$Lw6(bTp6<llu7bZ9FmQw2A#8R)l)OPC
z2P>!~ULkzpNMJ}Dz#+Os2@eW=8VhV<>(^kPjG&@F#Cq}yH7A7g=l}b%V*}zgXBKvT
E0FBx(KL7v#

literal 0
HcmV?d00001

diff --git a/w4+/Triangle.java b/w4+/Triangle.java
new file mode 100644
index 0000000..7277e62
--- /dev/null
+++ b/w4+/Triangle.java
@@ -0,0 +1,14 @@
+class Triangle extends Shape {
+    private double base;
+    private double height;
+
+    Triangle(double base, double height) {
+        this.base = base;
+        this.height = height;
+    }
+
+    @Override
+    public double getArea() {
+        return 0.5 * base * height;
+    }
+}
\ No newline at end of file